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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed96ff1f0cd9df1adf2928c13fbf2de78792f0bd190e60c2bfd9a70edb709e2f' 
  AND token = 'v4sxu38yPN31aCP/4QDUhLqp3OxYFSAhJMapgKShYTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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