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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70a74004a0cdac6be34f61ddc55e466313c78f9927df5ba449a80c46712c3aee' 
  AND token = 'o0uBz1cN6lhd4i3AwFDo6Cogw8Pyy7OPShZ56kiEJNc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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