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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e358d417b07918e7376205b38dc5fad63cf498fa1fd9a0d0425eeb093da2c5b3' 
  AND token = 'DLhk6Tlop67pwAuhxrzrgdVcKOj3MCpv7sdfLHKrFOc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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