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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aecf565b7169504051eddfd955974e21f327caa5af93b03a48db1e3f9f143aba' 
  AND token = 'mIAGDHbtGdeFdopU70R35O0vVWSf7yNHL04jc1Uwy9g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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