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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f5c3029e73b0b479a9177cbd040c7021e558f7f26096a3243bf02565b1ce1871' 
  AND token = 'EnTzdFXzULr7lLcmQif/hkUdDQltcpEbpwVWbg9ectE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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