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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '80c991eda1a1e8f0377e865c1abc19ab667177170235eebab1a3cd4a943399e4' 
  AND token = 'fibSbw9wHmgk12iO4M8yJkEQSiEfFw7d4fDYW7d0ilE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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