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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f8bd4a6037438b73483a8d35677801fd193b47d7adba8d4d52249ab15aad763' 
  AND token = 'MHLWz2ranQJ5FestS5sG90nr3OrLwmEMaLBjo17B0AE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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