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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09e3bb7b0221b843ab084919958aa5d94c86c84d0ec11e8262a75a01b59651d3' 
  AND token = '/Cnr7qr1/9TSeAoLLLoJL2BlZoK7Q/OBhyizs/JN2yA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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