SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fe178d09cefa77349ef20db88a3df4d6a0c8453557d30400677631796fb24140' 
  AND token = 'LlG5/cDiSNYz1Y+5jOXJ/JiMTxRlnSAHTGq5XXIsINY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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