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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '641d1b1636c373e27a3435107e9329ba42ceb723ded37d5063f208756c904f88' 
  AND token = '1tGXd3tph9ntUMX2xcQfkFF56vapfFZwNHGhHntmis0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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