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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'acbec61dc6d8b5d2fc585297139f1c16d8b90d83434737b552fd105b3464cfe0' 
  AND token = 'takJruicTUI2O64DROfkeL+C4/cMp0errTSslkYR+KU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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