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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0dd04407cc1009d8fb63a4ba49588108c45263aa089b288103f4970be01528d9' 
  AND token = 'X05t1uIh2YDeXujrBZeWU/+1+Tk4Ah4vFK649oLc+H0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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