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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '532513dd6f82e01b2fd89b8ca9bec59eba178af73ec19fad68e5ef3955d97601' 
  AND token = 'kF02XcZSvdiKGAHqzM8lRnoRbY1eZanOVxFCwH056MA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}