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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2d0bd02d2977c09224d00c8e531054eb339d090d6e139fda6122713a2850f2b2' 
  AND token = 'EBxLALOzCM3HEUUf2WmRHaPXPXFQqq+VoWIOXo9G09g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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