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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bb1178245c7f1a62f02a0ecd05ee6c287f95e6b30205762694afab2c0b6f9c5' 
  AND token = 'ZrHER5X1eKsF/Hz8skeCyXr754BKpxlXgZkS5/E/z/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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