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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '346b9487f841d4c2a4444186cc59d1f8ed5d93ee367e317088bb7c10e928677b' 
  AND token = '0qZ8YX5In0wiQp6xkNqY4Md1Lln9v1bt4oowEoJih3c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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