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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3dc5774ab8cca5887621ca5bd755bb20224461c594f8686ddc0716b31c31033' 
  AND token = 'Y4wImTnIA1bh+BZW1P8KeRbVgtx9SUir0gLJrUM5VxI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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