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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9700f88d4f19f5c197ee14f5b4cd82452d317fab8ab2da184cf2a4ea8ebbc7c4' 
  AND token = 'WAte4A4fvS93zl9lmmpD9BH2iv1yFMr4wr4OumD8yGo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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