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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c6f4b853fd747f819ff603fa58ecfc098f4c5c369d577d5a074c2183fdc79ca4' 
  AND token = 'nuss1XHc4R1EtGur+m76qFXK1TjfMuKFe/RlQJ/f3k4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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