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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '65007c0a952ed9cd6a23a2e6ac1babaa300f3ccd3b55330430a9d0219f1ef0d6' 
  AND token = 'eProReRo3b7C7PvhgALI2o4CgV3HyjcCVF33OTzWlzs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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