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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '167ef6c4267e09e79250a38faa72066ce4a9113d474a67ec4d54cfce12d84af8' 
  AND token = 't0zbS4FOpR+hT3/nlua8OetBRbzWigoMbWf8tF6xGnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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