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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c01731c7155c96c981a9a10d3a215c11d0d253d2b8a471ff07b1f4385126480' 
  AND token = 'RjNkHxc/OilQN1+4DIK8TRsAFVwOhSUdssAO8RDwW3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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