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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0faf104d72c73cac1264d60984f7b2b203fd6667fe9ab21569e55cdaea9246b7' 
  AND token = 'gWT3LhmPaZCw7T5el5OEQ5NUkkvYP2nrKfa1whApAEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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