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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f1193a63e5ff8d8e6a6acb190019bd8456c6164993afc249e982ec215b436e7' 
  AND token = 'J+4eOjFcelNBo4TSVvRH8T7tmVE2JihsLLs+axU397k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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