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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2cff951375fc0bee42fc033e192f5124a8e5483ecc28c080f2b638e4ba63cd6' 
  AND token = '+3fvBZMTDanPw+C4Fn0QZv/wspdkL3ottayaRiCsQKU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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