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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6c5f7c57f257f04a51514b73ad9fabf65a2602ad0b5932c66c4f05f2e21e930' 
  AND token = 'WSmpqSBxiUlaurx50bp/ke9pJ7Jxp4biVI6bU1IY3Rg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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