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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1d3823e324e5daec9c3a4a0353ad2e5a56b615a83a2e982a5c87b3b271007053' 
  AND token = 'T5KQgd1MozomxZyJ/yGPMJ2PtMZ2JTrSlLid/hXD0P0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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