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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a089a96998c89a81ceba8d95a7249ac428c2be849873794353d97c453e233b6' 
  AND token = 'kUOzpqLSrwfmQFNsVv3Q6xyXeBH+h4WU0IPUcNnAizE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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