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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '44c607afa9f08cccf8856bbc74bb3d4533f92dcb72328b34b2c81f21d3606c6e' 
  AND token = 'dYShGJyn0j48ftgvktZ/sOtxf35WrJTrp0u81Y6sX3I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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