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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bafb87e314b819de406b899eb49f191ed883d95225fc0954fb695f3ff48f63c' 
  AND token = 'HcGc95U8X/T9hrlF/bvyowGypmPOpdc6O1qX7ORsmBQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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