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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '11bd59b20c6afe3de8190bacf88a99eb0dc64fc308a115845e6467b1e40f03d6' 
  AND token = 'gJnTmTLtfvBbL7OVCDaKYjbyNFba6+cIf3CsbvV8GB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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