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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e26591091bbceadebdfda0b4586f8099cfb6a60106c63eeb5935e01456ba2e02' 
  AND token = '2YEuosf9G9szSvO5vkr/p02D8VssaiDU+p4ppmRg1nw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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