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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d41353e8ea4ad958fa9b1117ab5055779df0b33a0e173d044a2b8f53b8cd889' 
  AND token = 'KQB8qbIeyqLRHhx9t0H7KAjMpq6H/HpxWQ7v4m74svg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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