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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7200be02772188bf2b0b2b950694f0b631011a46b48187c9575d151d82040006' 
  AND token = 'ZAKK/UlyLxuFOBQsdDSdWnq+7ou+rTG+juT2AWx2kXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}