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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92a27d12610ae792100b1c2733cb014c767a73506184319d978a88babaf2979c' 
  AND token = 'XKvcbYhpJEeCzX/SxWFOQYX8r0q9K+deMKZ5elNa7u4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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