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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2dce47097d73642f16ccbce202caddff703a15594244a4a562ac3c14ed115f68' 
  AND token = 'Dbh7BlFqkITIlagCMoc9RO6c6l/5tC5Zlwb0ngLP4+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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