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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '902ba4b8c9a73a7776bbe83280e1356c6589b950a44d334fac9cdf60004946a7' 
  AND token = 'C79r7b7cgN1SYIleyAFT15ZoRg5xlOK5Uw5pNlxOdsc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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