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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f0340e02815f0c3dc97ef7ea1e79285549cbe901abc6cb1e828cf817500dd82' 
  AND token = '1PcYyzzWoZnPPOc+gnxwKO8eivwXQC2cbo5QeFd4uZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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