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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f14ceec0840dcd8d2461d0f0222e118b165d336b24ef0a6390883f184ea9a910' 
  AND token = 'Yt20Ra9xV7FqeVnrDgrTobmKoUD4z4IsDg2hiCEJYbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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