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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd14e36a876b52bc49cf400743762f4706aede636e26ce453213d3cb121d7a7c4' 
  AND token = 'G9njEopZKtQ/bZ6c+PgG2quUFLNh50X4w40j95ke7pY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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