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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01dd2ddef290a852a783abf8d59ee30757f7e99a6f395c85d7872a1fe98106d5' 
  AND token = 'kQEXfQCssybAB0LUkzxFCYVF6Tdp4LO6/s4JhYhsCq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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