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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '905130cfdac215a5c8c072a5dd60c1fac9b10da51cd6a3848d4bdc21e1f01169' 
  AND token = 'mD2CKP2JaGIiBt6z9eIuTuVt8O7dnMKEC2MDvwAozQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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