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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '898b2a61a64981fec821427d980a4d9bc8fbbb411335117b6b66f5eefa0b6bb4' 
  AND token = 'EaRSxJ6W+n7W3hAHCcEENrTLy4cOMX59VYk7W77meNk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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