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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '381693d95241084480fb5e67d22a12a68277b0e05fbeabd35f02bf1efd7ba10d' 
  AND token = 'SyoKIvp/f2gpdRe0xk4xKv+zei92akE3pylR/3nkK+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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