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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ae6b26ffa44c6bf5eb8118d759aa212e307be599c26e204a0a14a5d8d7fa255' 
  AND token = 'QP1oNibkB8ddfJYCKInVrUEwVjH0etv1SJaC8+p9fHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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