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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95d36726de13bd19f89c02bb73fed97c67253b3d42b543cdeec4c7b7117ea6b0' 
  AND token = '29Mm8bn3YoaJUBJnm0KaqnU9wnMwNa8+UkzrP4lJ7uA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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