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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d3c3a55b3c26fe321c7ce810321dc7823da5ff045562e23cfd09d134c77d084' 
  AND token = 'mD8yg5DhNIj0o5EyvqSqtKZF7B3apaV044l5vSQ2oqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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