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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dfc0b9244109d68db4caf379c32811698736eec78aacb14c38feca0243a1a4ac' 
  AND token = 'dILVAw3u3F1h0au9xdBshnBg0GG3RjZ1ofxxZBrvFlA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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