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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05fae606326d219ea3b5c810ff0b382a467740e0dc5b9654c2d9ab49e3301366' 
  AND token = 'TdnH84Veg+1GXh2O7tPf/ygkIvSAYQrTtNHKswTmYS8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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