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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '009e26523460061c3eece8fbaa563f8cd99455f2ebf7b53c2370edc0ddcbdb11' 
  AND token = 'OL4f3+x3X+yxif1TzPyqjIrp4MeuCdG5mZA6iJw9TDw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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