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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f1a5908a6fe77a00c2b6c99d7a5ffe692f71ec55fa9d73a011f0e63ee11b1e7' 
  AND token = 'EVidI7y7Pk7WbX+s4sTY81np7DYAdEjc3V57gNG7IeA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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