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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8d8552a4869aba53fdbf9241ae34129aedcb785f4759ce31789db4ffa975c0d5' 
  AND token = 'KHyDt9F3sSsBpuFUIyfB6CMPveo3h6mMRJo2oKV88TY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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