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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1323a67fd47f1ee66b1a93e85037f7ea700439bf6de9c73b53b1d8b41aeca4db' 
  AND token = 'KwpQQCMAeoBqyWEE4tDXy4KO/EyoGr9L/GaIBa3SuTc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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