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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90b4ab59db7d27a7a2b421a8062241688f77e961049ec005a9a158fcc51e47fd' 
  AND token = '6rwL1Mp6yaQXleFNAkRPIv/qXD7/8wtBTCWJDCW7fzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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