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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60ba3cf8d0534d14ce4cfe38d7e02773729d8e97df085176773eb8cabdc61e01' 
  AND token = 'jsoDFayN96yOhH1WzsQPhHSunpg287CnsG+mls3t+Os=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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