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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2062fb3d328f92273a71c3a5a5d6af051c2fe934ac8e8164b4cebb4f6a0b41d7' 
  AND token = 'rZb7h8Iz58EmDPnkNO15EPGCzo7evmlpL8grWc/iDEw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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