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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45ab77c9682066cde015cee118b0b85d7d1e005e87fec5bce3eb10e186625f8c' 
  AND token = 'YW5V7cdR4ghxUO59BrlfCszrUCrzApsjYPmVI+oCcRY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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