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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea96f55dbbc2a4621b1cc397eae1ee184a071a370f78185aeef7a89c54dedbfc' 
  AND token = 'VRGnkKIz0kg47F04uJ+yuHouWVTozaJdHQZQ3MMp33Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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