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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '610ee341854f0749ff7385a194d45b58a3f0ef45cee12cd941cfcd40b34215fe' 
  AND token = '3Ms0Pm0bqqoTGgElfx8p1jV7zZwTrMZInJYYEzKOWf0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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