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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aed1e05c3a8bf70d4f4fb560923a8c008920588052108a2a44a64e1267049ee3' 
  AND token = 'Mp5EkTe6ZyJpND78I7oPdus4txqQIVCLdszlj1ThMmQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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