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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '41baacba559f99029945b9a19d7aae0788cf3f23f822dfbe74222394122c9285' 
  AND token = 'Jz583xc8G9+sChqnX7u+P+Kh7HugcNyM1kF4IQJcic8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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