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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '031ebde7b9a6c78395f015d334473c11a9f568863849ee168b0f4cacbc4b03ce' 
  AND token = 'EYsbxJRRpFw1d0FkaSZTpyVDlX4sAU0qumi/I50Mcs0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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